/Engine/Source/Runtime/Slate/Public/Framework/Docking/TabManager.h
[FTabSpawnerEntry](API\Runtime\Slate\Framework\Docking\FTabSpawnerEntry) & SetGroup ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FWorkspaceItem](API\Runtime\Slate\Framework\Docking\FWorkspaceItem) > & InGroup )